Part A
9DBL0452BKILFT
Renesas ÉLECTRONIQUE
- Lifecycle
- Active
- Stock
- 1308 PCS
- Series
- Horloge Timing - Horloge timing pour une application spécifique
Replacement verdict
Compatible functional replacement candidate
The 9DBL0452BKILFT and 9DBL0242CKILFT are both 3.3V zero-delay clock buffers from Renesas with matching 24-pin QFN footprints and overlapping industrial temperature ranges, making them strong functional replacement candidates. However, the 9DBL0452BKILFT provides four differential outputs while the 9DBL0242CKILFT provides only two, so the replacement is only valid when the reduced output count is acceptable for the target design.
Output Type
High match
Output Channel Count
Not compatible
Package Type
High match
Operating Temperature
High match
Parts at a glance
Part B
9DBL0242CKILFT
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 3399 PCS
- Package
- VFQFN-24
- Series
- Horloge Timing - applications spécifiques
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 9DBL0452BKILFT | 9DBL0242CKILFT | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics | Renesas Electronics | Same manufacturer ensures consistent quality and support ecosystem. |
| Function | 4-output differential clock buffer | 2-output differential clock buffer | Output count determines how many clock loads can be driven, directly affecting board-level fanout capability. |
| Number of Outputs | 4 | 2 | A different output count changes the number of downstream devices that can be clocked, impacting substitutability. |
| Output Type | Differential (HCSL/LVDS-compatible) | Differential (HCSL/LVDS-compatible) | Matching output signaling ensures compatibility with the same receiver interfaces. |
| Input Type | Differential clock input | Differential clock input | Identical input type allows the same upstream clock source to drive either device. |
| Supply Voltage | 3.3 V | 3.3 V | Same supply voltage means no power rail redesign is needed when swapping parts. |
| Package | 32-pin VFQFN | 24-pin VFQFN | Different package footprints require different PCB land patterns, preventing drop-in replacement. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings ensure both parts suit the same industrial application environments. |
| Maximum Output Frequency | 200 MHz | 200 MHz | Same maximum frequency supports the same high-speed clock distribution requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 9DBL0452BKILFT | 9DBL0242CKILFT |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Obsolete | Active |
| PLL | Yes | Yes with Bypass |
| Main Purpose | PCI Express (PCIe) | PCI Express (PCIe) |
| Input | HCSL | HCSL |
| Output | HCSL | LP-HCSL |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:4 | 1:2 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 200MHz | 200MHz |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | 9DBL0452 | - |
| Digi Key Programmable | Not Verified | - |
| Packaging | Tape & Reel (TR) | - |
Frequently asked questions
What are the 9DBL0452BKILFT and 9DBL0242CKILFT devices?
The 9DBL0452BKILFT and 9DBL0242CKILFT are Renesas clock buffer/fanout devices in the 9DBL series. The 9DBL0452BKILFT is a 4-output differential clock buffer, while the 9DBL0242CKILFT is a 2-output differential clock buffer. Both are designed for PCIe and similar high-speed clock distribution applications.
What is the difference in output count between the 9DBL0452BKILFT and 9DBL0242CKILFT?
The 9DBL0452BKILFT provides 4 differential outputs, whereas the 9DBL0242CKILFT provides 2 differential outputs. This is the primary functional difference between the two parts.
Do the 9DBL0452BKILFT and 9DBL0242CKILFT support the same input and output signal types?
Both devices are differential clock buffers intended for high-speed clock distribution. Verified Renesas documentation should be consulted for the exact input and output signaling standards supported by each part, as these details are specified in the respective datasheets.
Are the 9DBL0452BKILFT and 9DBL0242CKILFT pin-to-pin compatible?
No. Because the 9DBL0452BKILFT has 4 outputs and the 9DBL0242CKILFT has 2 outputs, their pin counts and pin assignments differ. They are not pin-to-pin compatible and cannot be interchanged without design changes.
Can the 9DBL0452BKILFT be used as a drop-in replacement for the 9DBL0242CKILFT?
No. The 9DBL0452BKILFT has a different output count and package pinout than the 9DBL0242CKILFT. A drop-in replacement is not possible without verifying package, pinout, and electrical compatibility against the manufacturer datasheets.
What is the significance of the "KILFT" suffix on both part numbers?
The "KILFT" suffix indicates the package, temperature grade, and packing specification assigned by Renesas for these devices. The exact meaning of each character is defined in the Renesas part numbering documentation and should be verified against the official datasheet or product page.
Are the 9DBL0452BKILFT and 9DBL0242CKILFT suitable for PCIe clock distribution?
Both devices belong to the Renesas 9DBL clock buffer family, which is used for PCIe and similar high-speed differential clock distribution. Designers should confirm the specific PCIe generation and compliance requirements against the respective datasheets before use.
Where can verified technical data for the 9DBL0452BKILFT and 9DBL0242CKILFT be obtained?
Verified technical data is available from the official Renesas product pages and datasheets, as well as from authorized distributors such as DigiKey, Mouser, TTI, and Future Electronics. These sources should be used to confirm all electrical, package, and ordering parameters.